基于减隔震技术的预制拼装桥墩抗震设计

节段预制拼装桥墩技术在低地震区应用相对比较常见,高震区特别是8度区以上地区应用很少,究其原因是因为高震区的抗震问题尚未得到大家统一认可.现以河北地区一处立交主线桥抗震设计计算为例,阐述减隔震技术在预制拼装桥墩抗震设计方面的应用.通过计算分析可知,预制拼装桥墩上采用减隔震技术可很好地满足工程要求并能回避预制拼装接缝延性耗能问题,是高震区预制拼装桥墩抗震一个比较好的选择.

Aseismic Design of Prefabricated Bridge Pier Based on Seismic Reduction and Isolation Technology

The application of segmental prefabricated bridge pier technology in low earthquake area is relatively common, but it is rarely used in high earthquake area, especially in the area above 8 degree. The reason is that the aseismic problem in high earthquake area has not been uniformly recognized. Taking the aseismic design and calculation of a main overpass in Hebei Province as an example, the application of seismic reduction and isolation technology in the aseismic design of prefabricated pier is expounded. Through the calculation and analysis, it can be seen that the seismic reduction and isolation technology used for the prefabricated pier can better meet the engineering requirements and avoid the problem of ductility energy consumption of prefabricated assembly joints, which is a good aseismic choice for prefabricated piers in high earthquake area.